T. Aoki, N. Takei, H. Yonezawa, K. Wakui, T. Hiraoka, A. Furusawa, P. van Loock
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Experimental verification of continuous-variable tripartite entanglement
A continuous-variable tripartite entangled state is experimentally generated by superimposing three independent squeezed vacuum states. We verify the entanglement by measuring the variances of total momentum and relative positions.